import java.util.Scanner;

public class pp222
{
   public static void main (String[] args)
   {
   int a, b, c;
   double d;

  Scanner scan = new Scanner (System.in);

  System.out.print ("The first number: ");
  a = scan.nextInt( );
  
   System.out.print ("The second number: ");
  b = scan.nextInt( );
  
  System.out.print ("The third number: ");
  c = scan.nextInt( );

 d = (a + b + c) / 3;

  System.out.println ("average: " + d);
   }
}

